Water heater



A. SZARKA WATER HEATER Filed Dec. 51, 1926 f f f Sept. 10, 1929.

WEA/ng,

ATTORNEYS.

Patented Sept. 10, 1929.

narran STATES AUGUST SZARKA, or BARnERToiv', enna.'l

WATER HEATER,y

applicati@ filed necember arises* serial N6. 158,176'.

This invention relates to water heaters, particularly of the instantaneous type.

The general purpose of the invention is to provide an improved heater capable of more etiicient heating while at the same time being easily cleaned and inexpensively repaired.

.lhe `foregoing and other objects are obtained by the construction illustrated in the accompanying drawings and briefly described below. It is to be understood that the invention is not limited to the specific forni thereofl shown and described.

@if the accompanying drawings, Figure 1 is an elevation of an improved heater embodying the invention;

Figure 2 is a section on line 2 2 of Figure 1;

Figure 3 is a section on line 3 3 of Figure 1 and y Figure 4 is a section on line 4 4 of Figure 1.

leiferring to the drawings, the numeral 10 represents a duplex header having a water inlet at 11 and a water outlet at 12. The header 10 is divided by vertical partitions 13, 13 and 14, 14 and vertically spaced horizontal partitions 15 into a series of horizontally extending courses having pairs of offset communicating pockets 16 and y17 arranged in cach course. As shown in Figure 3, the inlet 11 empties into a pocket 16 on an end of the lower-most course. Connected with and extending laterally from each pocket 16 of the header 10 is an yopen end tube 19 of comparatively small bore into which water may flow from pockets 16 and connected onto each pocket 17 is a closed end tube 18 arranged about tubes 19 into which water may flow from tubes 19 and emptying into the' pocket 16 of a succeeding pair of pockets.

To deliver water from one course to another higher course, they are connected alternately at opposite ends by ports indicated at 2O and 21, the highest course having outlet pipe 12 connected therewith. The arrangement of the courses of header pockets 16 and 17 is such that alternate pairs of tubes 18 and 19 are offset or staggered both horizontally and vertically.

To the header 10r a suitable casing 23, here shownof U-shape, may be removably secured as by screws 24, 24'. The casing 23 maybe lined with a heat-insulating material, such as asbestos 24, and may havedoors 25, 25 therein. The `tubes 18 and 19 are preferably'r'e- 5s i movably secured `to the header byf being threaded into Vthe walls or partitions thereof to perinit easy removal for cleaning and to provide for inexpensive repairing lby replacement of leaky tubes.

The ybottoni ot' easing 23 is open and a gas burner 26 is set therein so that the gaseous productsoi' combustion from the burner will pass upwardly through the casing about tubes 18. The topiof theycasing 23 is closed, 'e but'provided with an aperture 23-to whichy `is' connected a flue pipe 23h. f

yBurner 26 is connected to a fuel supply through a valve 27 to a supplyline 28. f A by-pass'29 around thefvalve is connected t0 a pilot y30 for theburner. Valvef27 is arrangedtobe controlled by drawing of water from the system through the heater by rneans of`a\,flap;31 arranged inwater supply line'321 L and connected toan yarni 33 in turn connected by a link .34 to an operating arm 35 f rorn valve 27. A` spring 34a is arrangedto z close valvef27 when the water is shut off.

In use, the pilot 30 will be permanently f lighted. Upon vdrawing water from a faucet (not shown) on the delivery line 12 the low of water in pipey 32 will operate flap 311:0 swingl arin 33 upwardly and through link 34 will open valve 27 to supply gas to burner 26. The water will pass into the header 10 and will flow outwardly from the header in the large tubes, then back to the header in the small tubes following each horizontal coarse from one end to the other and alternate courses in opposite directions, thus flowing in a zigzag path upwardly to the delivery pipe 12. e

It will appear that the cooler water Hows first through the outer tubes 18 having direct Contact with the burner gases. In addition to effectively heating the water by this provision, these tubes vrare cooled by the Water to prevent rapid deterioration by oxidation thereof. The inner tubes are not subject to oxidation, being protected by the water in tubes 18 from theetfect of any heat and air thereon. Y Modications of the invention may be resorted to without departing from the spirit 5 thereof or the scope of the appended claims. f

What is claimed is:

1. A water heater comprisin a series of horizontally and vertically o set pairs of tubes arranged in horizontal courses, one

course above the other, eachpair of tubes including an outer closed end tube andan inner open ended tube enclosed by the outer tube, a header arranged to deliver water to the inner tubes and to receive the water from the outer tubes in succession and to deliverv water from one end of one course t0 the adjacent end of a higher course in succession so. that the water will follow a zigzag path upwardly, said tubes being removably secured toy and supported entirely by the header, a easingsurrounding thek tubes and removably mounted on the header, and a gas burner at, the bottom of the casing for providing. heated gases of combustion to pass upwardly about the tubes, said burner being supported kon the header. Y Y

2. A water heater comprising a series of pairs of tubes arranged in courses, one course above the other, each pair of tubes including an outer closed end .tube and an inner open ended tube enclosed by the outer tube, a rheader arrangedy todeliver water to the inner tubes and to receive the water from the buter tubes in'successionand to deliver water from one end of one course'to the adjacent end of a higher course in succession, said tubes beingremovably'secured to and supported entirely by the header, a casing surrounding the tubes and removably mounted 40 onthe header, and a gasv burner at the bottom of the casing for providing heated gases of combustion to. pass upwardly about the tubes, said burner lbeing* supported on the header. v 

